Universal sharpener



Feb. 27, 1940. PRMAK 2,191,899

UNIVERSAL SHARPENER Filed Sept. 7, 1937 2 Sheets-Sheet 1 'A-Primar Feb. 27, 1940. p M K 2,191,899

UNIVERSAL SHARPENER Filed Sept. 7, 1937 2 Shets-Sheet 2 A-FT'iTTIB K Patented Feb. 27, 1940 UNITED' STATES PATENT; OFFICE 1 x i 2,191,899 i I UNIVERSAL SHARPENER p M AdamPrimak, Milwaukee, Wis. I Application September 7, 1937, Serial No. 162,717

3 Claims.

s5 and the like.

One of the primary objects of my invention is to provide a sharpening device embodying a novel rest or clamp for the work, so that knives, scissors, etc, can be conveniently held thereon and retained in the desired position best suited for engagement by the ab-rading or sharpening member.

.Another salient object of my invention is to provide a rest in which scissors and the like can be conveniently clamped on one face thereof, and knife blades on another face thereof.

.A further object of my invention is to provide novel means for mounting the abrading member on the device, whereby the member can not only 30 be readily operated at different angles and heights to correspond with the body of the cut ting edge of the scissors or other implements on the rest, but can also be advanced across the length of a blade, thereby'rendering the device applicable for correctly sharpening the teeth of saws;

A further important object of my invention is to providenovel means for reciprocally mounting the abrading or sharpening member on a guide rod rockably supported by a traveling nut on a feed screw, whereby the desired adjustments can be obtained and the sharpening quickly accomplished.

A still further object of my invention is to provide a sharpening device of the above character, which will be durable and efficient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost. 3 With these and other objects in View the invention consists in the novel construction, arrangement, and formation of parts, as will be hereinafter more specifically described, claimed,

and illustrated in the accompanying drawings,

in which drawings:

Figure 1 is a top plan view of my improved sharpening device, showing parts thereof broken away and in section to illustrate structural de-' tails.

' Figure 2 is aside elevation of the device, with Figure 5 is a detail fragmentary view il1us-' trating a modified form of guide rod for the reciprocating abrading member, which can be mounted in different position on the device.

Figure 6 is a detail section taken on the line 5 6-6 of Figure 1, looking in the direction of the arrows, illustrating the adjustment for the guide rod.

Figure 7 is a detail section taken on the line 'I-'l of Figure 2, looking in the direction of the arrows. V i

Figure 8 is a view similar to Figure 3, showing ascissor or shear blade in dotted lines, held on the implement rest.

Figure 9 is a transverse section through the abrading member, taken on the line 9--9 of Figure 2, looking in the direction of the arrows.

Figure 10 is a detail section taken on the line Iii-I0 of Figure 1, looking in the direction of the arrows, illustrating the position of the traveling nut, which is used for rockably supporting the guide rod.

Referringito the drawingsin detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter D generally indicates my improved sharpening device, which includes an upright post formed on a supporting base iii, which can be of any desired form. The upper end of the post i 5 has secured thereto or formed thereon the rest for the implements tobe sharpened. This rest embodies a head I! having a horizontally disposed body portion 18 and a depending Vertically 'dis posed flange [9. The lower edge of the flange l9 has in turn formed thereon the outwardly extending seat or rib 2b, which is provided with a plurality of threaded openings 2.! for the reception of supporting screws 22, the purpose of which will be hereinafter more fully set forth.

The upper face of the body portion i8 is utilized for supporting knife blades to be sharpened, while the flange l9 and its rib 28 form a support for scissors,'saws, and the like, which are to be sharpened. j

Arranged upon the upper face of the body por tion I8 is a horizontally extending clamping jaw 23 for the knife blades, and this jaw has formed thereon 2. depending tail piece '24 received in a slot in the body portion of the rest. The tailpiece intermediate its ends is rockab-ly mounted upon a pivot pin 25 carried by the rest, and-an adjustment screw 26 is carried by the rest for engaging the lower end of the tail-piece, whereby the tail-piece can be rocked, so as to move the jaw 23 into its clamping position relative to the top face of the body portion "3. i

A clamping jaw 21 is provided for engaging the implements which are to be clamped in a. vertical plane against the flange l9, and this jaw is also provided with a depending tail-piece 2B,

git

the file and stone.

which is received in a slot 29 formed in the rib 20. An adjusting screw 30 is carried by the post l5 and bears against the lower end of the tailpiece 28, whereby the jaw 2'! can be brought into its clamping position relative to the Work. The work is adapted to be supported by the screws 22, and, obviously, these screws can be raised and lowered. relative to one another, so that the work can be supported in the desired position.

Firmed on or secured to the post I5 below the work rest is an outwardly extending arm 31, the outer end of which in turn has formed thereon the upwardly extended, right-angularly. disposed, threaded standard 32. If desired, the arm 3| can be braced adjacent to its outer end by a depending leg 33. This leg can be provided with any preferred type of foot 34 for engaging the surface on which the sharpening device is placed.

Threaded upon the standard 32 is an adjustable block 35, having formed thereon the laterally extending bracket 36. The outer end of the bracket 36 has formed thereon a bearing ear. 3? for receiving one end of a feed screw 38, which extends longitudinally of the bracket. This feed screw rotatably extends through a smooth opening formed in the block 35, and the feed screw has formed thereon or secured thereto a manipulating crank 39, whereby the feed screw can be readily turned.

In order to prevent longitudinal movement of the feed screw in the block 35,the block carries a holding screw 40, which is adapted 'to engage in an annular groove formed in the feed screw. To hold the block against turning movement on the standard 32 after the adjustment of the block, the block carries a thumb-screw 42, which is adapted to contact with the standard 32.

Mounted upon the feed screw 38 is a traveling nut 53 having formed thereon a pair of spaced outstanding ears M. The guide rod for the abrading member Q6 is received between the ears 44 and rockably mounted thereon by a pivot pin 41. Obviously, by rotating the feed screw the traveling nut can be fed longitudinally of the bracket and longitudinally of the implement rest.

The abrading member M includes a longitudi- I nally extending sleeve 48 having formed on its inner end a clamping block 49. The opposite end of the sleeve terminates in a threaded shank 50 on which is adjustably mounted the manipulating handle M. is an adjustable clamping block 52, and a file 53 and a sharpening stone 54 are adapted to be clamped between the blocks A3 and 52 on opposite sides of the sleeve 48.

By turning the handle 5|, the same can be brought into contact with the block 52, so that the block can be moved into its gripping position with Obviously, the file and stone can be of any desired character. v

In use of my improved device, the abrading tool is placed on the guide rod 45 and turned on the guide rod, so as to bring either the file or the stone into correct position for engaging the implement to be sharpened. The abrading membar can be reciprocated on the guide rod, sothat the file or stone can be brought across the scissor or knife edge, as the case may be.

When scissors or other like implements are to be sharpened, the same are placed on the screws 22, and the screws are adjusted to bring the cut- Slidably mounted upon the sleeve 48 7 ting edge into the desired position above the top face of the implement rest, after whichthe screw 3D is manipulated to bring the jaw 21 into gripping contact with the blade. The block 35 is now raised or lowered so that the abrading implement will be disposed at the desired angle, and the feed screw can be rotated so that the feed nut will be arranged at the best desired position for supporting the abrading member.

The abrading member can now be reciprocated and swung on the pivot pin 41, as heretofore described. a

When a knife is to'be sharpened, the same is laid on the top face of the body portion I8 of the rest under the jaw 23, and when the blade is disposed in the correct position the jaw 23 is moved I into its clamping position therewith. After the desired adjustment of the abrading member, the

abrading member is reciprocated back and forth over the cutting edge.

When saws are to; be sharpened; a triangular r file (not shown) can be substituted for the flat file 53, and after a tooth has been sharpened the screw can be given a turn, so as to advance the traveling nut the distance of one tooth, so that the next saw tooth can be correctly sharpened.

In some instances, the block 35 with its bracket and feed screw can be removed from the standard 32,.and the traveling nut 43 can be threaded directly on the standard 32.

In Figure 5 I have shown a nut 54 threaded directly on the standard32, and, if desired, a guide comprising, a clamp for the implement to be sharpened, a feed screw extending in spacedpar allel relation to the clamp, a traveling nut on the feed screw, a guide rod rockably secured to the nut, and an abrading member reciprocally mounted on the guide rod.

2. A manually operated sharpening device comprising, a clamp for the implement'to be sharpened, a vertically disposed threaded standard ar-' ranged in advance of the clamp, a block adj'usta- I- bly mounted on the standard, a laterally extending feed screw rotatably'carried by the block and disposed in substantial parallel relation to the clamp; a traveling nut on the feed screw, and a reciprocating abrading member rockably connected to the nut- A manually operated sharpening device comprising, a post, a base on the lower end of the post, a tool rest on the upper end of the post,

clamps carried by the rest, an outwardly extend- T I ing arm carried by the post, an upstanding, verticaliy disposed threaded standard on the .arm,a block adjustably mounted on the standard, a feed screw rotatably carried by the block and disposed in substantial parallel relation to thejtool rest, a traveling nut on the feed screw, a guide rod rockablyconnected to the nut, and an abrading member slidably mounted on the guide rod.

ADAM P rMAK. 

